Number Sense is the ability to appreciate the size and scale of numbers in the context of the question at hand. Three elements establish Number Sense: Counting, Wholes and Parts, and Proportional Thinking. We already introduced Counting in Part 1 of our Number Sense Series. Today, we will focus on Wholes and Parts.
The two aspects of the concept of Wholes and Parts form the backdrop for many mathematical concepts: fractions and complements.